PSLETim had 3.2 m of rope. He used some of it to make the figure as shown.
- How much of the rope did Andy use to make the figure? Leave your answer in the simplest form in terms of w.
- If w = 15, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= w + w + w + (2w - 3) + (w + 20)
= w + w + w + 2w + w - 3 + 20
= (6 w + 17) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of rope used if w = 15
= 6 w + 17
= 6(15) + 17
= 90 + 17
= 107 cm
Total length of rope not used
= 320 - 107
= 213 cm
1 cm = 0.01 m
213 cm = 2.13 m
Answer(s): (a) (6w + 17) cm; (b) 2.13 m